Volume 1: Taiyo no Mukara (Mukara of the Sun)

It is summer of 1990. All the Troopers but Shin are in their segundo taon of high school, Shin is in his third. Nasuti is pagbibisikleta around the lake near her home. She comes tahanan to find a letter from Jun telling her that he's gone stargazing with Touma. Shuu and Shin meanwhile are at the tabing-dagat where Shin is teaching Shuu how to surf. A big wave comes and wipes both of them out. As they lie on their boards, Shin teases Shuu that he likes to fight. Shin is just glad that they, the Troopers, no longer have to wear their yoroi.

Jun and Touma are walking...